Defending champion Jelena Ostapenko knocked out of Rothesay Classic

The Latvian, ranked 13th, won her second career title on grass last June but she was beaten 6-3 6-3 at Edgbaston Priory by Cocciaretto, who needed seven match points to make it over the line.

The Italian will next face American former US Open champion Sloane Stephens, who saw off China's Yuan Yue by the same scoreline, while former Flushing Meadows runner-up Leylah Fernandez wasted little time dispatching Spain's Sara Sorribes Tormo 6-1 6-1.

Third seed Sorana Cirstea was another early casualty, the Romanian losing 7-6 (2) 6-2 to China's Zhu Lin, but there were wins for seventh seed Anastasia Potapova and two-time Wimbledon quarter-finalist Ajla Tomljanovic.

Nottingham champion Katie Boulter is scheduled to begin her campaign on Tuesday against Anhelina Kalinina while Heather Watson, Harriet Dart and former world number one Caroline Wozniacki are also in action.

Wimbledon winner Marketa Vondrousova returned to the grass with a 6-4 6-3 victory over Rebeka Masarova at the Ecotrans Ladies Open in Berlin.

Top seed Aryna Sabalenka has a first-round bye, but in her pre-tournament press conference, the Belarusian revealed she will not play in this summer's Paris Olympics.

Like Emma Raducanu, the world number two has decided switching surfaces back to clay would not be good for her body.

"Especially with all the struggles I've been struggling with the last months, I feel I have to take care of my health," she said. "It's too much for the scheduling.

"I prefer to have a little rest to make sure physically and health-wise I'm ready for the hard courts. I feel that this is safer and better for my body."